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Network Types
Airport: Wireless networking. See 802.11a, 802.11b, & 802.11g
ATM: Asynchronous Transfer Mode. A high bandwidth packet-based network
technology deployed as the backbone for Access New Jersey. A connection oriented
service that transmits voice, data, and video traffic in fixed cell lengths at
high speeds into the gigabit range.
BRI: Basic Rate Interface (ISDN), two 64 kilobits per second (Kbps) B
channels and one 16 Kbps D channel (2B+D).
Broadband: A telecommunications link that runs at more than 1.5 megabits
per second (Mbps).
Cable Modem: Used to provide broadband connection provided by cable
operators. Shared network technology with up to 1.5 Mbps.
Dial up: Service offered using analog modem with bandwidth usually up to
56K. Not enough bandwidth for videoconferencing.
DS-1: High Capacity Digital Data Services provide extremely powerful and
accurate point-to-point private line service at digital transmission at speeds
of 1.544 Megabits per second (Mbps).
DS-3: High Capacity Digital Data Services provide extremely powerful and
accurate point-to-point private line service at digital transmission. DS3 uses
the high-performance, reliable circuitry of fiber optic transmission facilities
to give you the equivalent of 28 T1 channels or 672 regular voice grade channels
in 45 Mbps connection.
DSL: Digital Subscriber Line. Broadband connection provided by Verizon
using existing telephone lines. Dedicated connection technology. Verizon DSL
connection, you can transfer data at speeds up to 1.5 Mbps downstream and up to
768 Kbps upstream
802.11a: Wireless networking standard offering up to 54 Mbps that is not
compatible with 802.11b.
802.11b: Wireless networking standard offering up to 11 Mbps that is not
compatible with 802.11a.
802.11g: Wireless networking standard offering up to 54 Mbps that is
compatible with 802.11a and 802.11b.
Firewall: A firewall is a set of related programs, located at a network
gateway server or standalone device that protects the resources of a private
network from users from other networks. (The term also implies the security
policy that is used with the programs.)
Frame: Frames are variable-length packets of data that are created when a
stream of information from an end user's device (a PC, terminal, or LAN) is sent
to frame-relay specific equipment and divided into smaller parts. Each frame
includes the data plus the network address and error detection information.
Frame Relay: High Speed packet-based technology that uses the public
network to give you multiple Permanent Virtual Connections (PVCs). These PVCs
provide multiple-site connectivity all through the same access line.
H.320: Suite of standards for multimedia conferencing on narrowband
switched digital networks. Commonly used with ISDN service.
H.321: Suite of standards used for ATM conferencing.
H.323: Suite of standards for multimedia conferencing on traditional IP
networks.
IDLS: Older proprietary “closed” video network that was unable to cross
LATA boundaries used in New Jersey early deployment for distance learning. IDLS
is in its end of life. ANJ Video Portal still bridges IDLS in North Jersey for
existing customers.
IP: See H.323.
ISDN: Integrated Services Digital Network. A digital telephone line used
for voice, data and compressed video. See BRI and PRI.
LAN: Local Area Network
Narrowband: A telecommunications link that operates at 1.5 Mbps or less.
OC-3: Optical Circuit with up to 155 Mbps speed.
POTS: Plain Old Telephone Service. H.324 is the videoconferencing
standard that utilizes POTS. The Video Portal network does not support the H.324
standard.
PRI: Primary Rate Interface (ISDN), 23 64 Kbps B channels and one 64 Kbps
D channel, equivalent to a T-1 line.
PVC: A permanent virtual circuit (PVC) is a software-defined logical
connection in a network.
T-1: 1.544 Mbps digital line. Sometimes referred to as a broadband
circuit.
T-3: 45 Mbps digital line. Sometimes referred to as a broadband circuit.
TCP/IP: Transmission Control Protocol/Internet Protocol. A set of
protocols developed by the Department of Defense to link dissimilar computers
across networks.
- TCP/IP is the standard upon which the Internet is based. In
videoconferencing, IP sometimes called H.323 video capability will
be a future enhancement to the Video Portal network.
WAN: Wide Area Network
Wireless: Network without wires using standards like 802.11a, 802.11b, or
802.11g.
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